This VL1B-NF30N-25NO/NC-L2M is an inductive proximity sensor with a M30 Nickel plated brass body with a Non Flush mounting design. It has a metal body length of 55 mm and is 4 wire , NPN, NO+NC, with a sensing distance of 25 mm and an PVC cable/2m ; 4*0.25mm2. It has a power supply of 10~30V DC and protection rating of IP67. This highly durable sensor is perfect for Industrial Automation applications.